Means foe



ms. SIBERT. MEANS FOR CUTTING OFF WATER FROM LQWER STRATA 0F DRILLEDWELLS.

' APPLICATION FILED AUG.2. l9l 8.

Patented Dec. 23, 1919.

anmatoz UNITED STATES NICHOLAS S. SIBERT, F SAVONBURG, KANSAS.

MEANS FOR CUTTING OFF WATER FROM LOWER STRATA OF DRILLED WELLS.

To all whom it may concern:

Be it known that I, NICHOLASS. SIBERT, a citizen of the United States ofAmerica, re-

siding at Savonburg, in the county of Allen and State of Kansas, haveinvented new and useful Improvements in Means for Cutting Off Water fromLower Strata of Drilled Wells, of which the following is aspecification.

This invention relates to means for cutting off water, gas or oil fromthe lower strata of a drilled well, in the event that the drillingoperation has been continued to such an extent as to penetrate stratabelow that from which it is desired to permit the water or oil to flow.

The invention consists in certain novel I means hereinafter describedfor placing an obstruction such as a plug of compressible material atthe desired point to shutoff the flow in the manner described.

In the drawings, Figure '1 is a vertical section through the device inoperative position.

Fig. 2 is a section on line 2-2 of Fig. 1.- Fig. 3 is a section on line33 of Fig. 1. Fig. 4 is a section on line 44 of the same figure.

Fig. 5 shows another form, in vertical section.

In carrying out my inventionI employ a plug of compressible materialdesignated 10,

this plug being bound with. wire 12 at the lower end and also beingbound with wire at the upper end as shown at 13. The plug may be ofrubber and it is provided with a central bore 14.

A pipe section 15 is provided with an upper flanged portion 16internally threaded -.as shown at 17 for receiving an externallythreaded head 18, this head being provided with a bore 19. Within thepipe 15 is a smaller pipe 22 threaded at its upper end and engagingthreads in the bore 19 of the head 18. Y i

A device termed a spear and including a head 25 is provided with a shank26 the lower end of which is provided with cutaway portions 27 of theform shown, the head 25 being also cutaway in the manner indicated, thecutaway portions last mentioned being designated 28. '-Within cutawayportions 27 and 28 are freely mounted engaging devices 30 whichmay betermed dogs and which are provided with toothshaped portions 31, theseportions enga ing the walls of the inner tube 22 and the ogsSpecification, of Letters Patent.

Patented Dec. 23, 1919.

Application filed August 2, 1918. Serial No. 248,005.

located Within the head of the spear engagmg weh bore designated 33.

he elements are forced downwardly, compressing the rubber and causingthe latter to expand and to be retained in position within the bore, thedogs above described engaging the adjacent surfaces of the tube 22, andof the well bore at a point opposite head 2-5, and retaining the entireconstruc- 'tion positively in the desired position for shutting off theflow of Water, oil, or gas from the lower strata orstratum which hasmember, a head connected therewith, saidhead being positioned adjacentto the lower end of the plug, a spear including-a shank portion and ahead engaging the upper end of the plug, and means for forming a posi--tive connection between the shank of the spear and the tube connectedwith the head first named, the head engaging the upper end of the plugbeing provided with recesses, and freely movable clamping elementswithin said recesses, for preventing the upward movement of thestructure speci- I fied.

2. In a device of the class described, a plug comprising a compressiblemember aving a longitudinal bore, a lower tubular member, a headconnected therewith, said head being positioned adjacent to the lowerend of the plug, a spear including a shank portion and a head enga 'ngthe upper end of the plug, and means or forming a ositive connectionbetween the shank o the spear and the tube connected with the head firstnamed, the shank being provided with cutaway portions for receiving saidmeans last mentioned, the head engaging the upper end of the plug beingprovided with recesses, and freely movable clampmg elements within saidrecesses, for preventing the upward movement of the structure specified.

In testimony whereof I afiix my signature.

NICHOLAS S. SIBERT.

